Australian Energy Market Operator

AEMO operates Australia's National Electricity Market (NEM), the interconnected power system in Australia’s eastern and south-eastern seaboard, and the Wholesale Electricity Market (WEM) and power system in Western Australia.

AEMO operates gas retail markets in New South Wales and the Australian Capital Territory, Queensland, South Australia, Victoria, and Western Australia. AEMO also operates wholesale gas markets in south-eastern Australia, those being the Declared Wholesale Gas Market in Victoria (DWGM), the Short Term Trading Market in Adelaide, Brisbane and Sydney (STTM), and the Gas Supply Hub (GSH), whose trading locations are based at Wallumbilla in Queensland, and Moomba in South Australia. AEMO also operates the Natural Gas Services Bulletin Board (GBB), and is system operator of the Victorian Gas Declared Transmission System. AEMO is also responsible for Gas Services Information functions in Western Australia.

AEMO is consulting on changes to the STTM Procedures to align the procedures with the National Gas Rules, as set out in the National Gas Amendment Rule 2014 No. 2. These rules commence on 1 November 2014.

Proposed Procedure Changes

AEMO has published a Proposed Procedure Change below, covering the following modifications to the STTM Procedures:

Change the way deviation prices are determined effecting the resulting deviation payments and charges.

Create a new Market Information System (MIS) report to show the deviation prices used on a gas day.

Modify the settlement surplus and shortfall allocation methodology to allocate shortfalls on the basis on withdrawals.

Notice to Participants of AEMOs decision on making the STTM Procedures - version 10.0
AEMO has published a notice to participants of AEMOs decision on making the STTM Procedures - version 10.0. New STTM Procedures come into effect on Saturday, 1 November 2014.